2. match the synonyms. litter. throw away. poison. useless things. nuclear. turn out. waste. the world. appear. dangerous substance. disappear. using once again. environment. come out of sight. recycling .connected with atom energy.

Litter - throw away
poison - dangerous substance
nuclear - connected atom energy
waste - useless things
appear - turn out
disappear - come out of sight
environment - the world
recycling - using once again